https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78979
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-01-03
Ever confirmed|0 |1
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Rainer Orth from comment #0)
> The 27_io/headers/cstdio/functions_neg.cc testcase started to FAIL on Solaris
> between between 20160930 and 20161003:
>
> FAIL: 27_io/headers/cstdio/functions_neg.cc (test for errors, line 24)
>
> This is
>
> using std::gets; // { dg-error "has not been declared" }
>
> obviously caused by
>
> 2016-09-30 Jonathan Wakely <jwak...@redhat.com>
>
> PR libstdc++/77795
> * acinclude.m4 (GLIBCXX_CHECK_STDIO_PROTO): Use -std=gnu++11 to check
> for gets.
> * config.h.in: Regenerate.
> * configure: Regenerate.
> * include/c_global/cstdio [!_GLIBCXX_HAVE_GETS] (gets): Only declare
> for C++98 and C++11.
> * include/c_std/cstdio [!_GLIBCXX_HAVE_GETS] (gets): Likewise.
> * testsuite/27_io/headers/cstdio/functions_neg.cc: New test.
>
> Ultimately, this happens because config/sol2.h (TARGET_OS_CPP_BUILTINS)
> always
> has
>
> if (c_dialect_cxx ()) \
> { \
> builtin_define ("__STDC_VERSION__=199901L");\
That should be fine for C++11 and C++14, because they use the C99 standard
library. For C++17 that should define 201112L instead.
> so enabling the gets decl in <iso/stdio_iso.h>, which is
>
> #if __STDC_VERSION__ < 201112L
> extern char *gets(char *) __ATTR_DEPRECATED;
> #endif
>
> even for C++11 mode.
Oh, and the Solaris header also puts it in namespace std, right?
I think we should just XFAIL the test for Solaris. We can't prevent the Solaris
header from declaring std::gets, so we shouldn't expect the test to pass.
